The Fayette County district attorney says more charges could be filed against two sisters if an autopsy shows that an elderly woman's death stemmed from an alleged attack outside the South Union Township Walmart.

Jenna Boyd, 27, of North Union Township, pleaded guilty Monday in Fayette County Court to child endangerment and unsworn falsification to police. Prosecutors dropped charges of theft and conspiracy and agreed to recommend a one- to five-year prison sentence.

Brittany Boyd, 25, earlier pleaded guilty to robbery and aggravated assault and was sentenced to nine to 20 years in prison.

Prosecutors said Brittany Boyd took Mary Yourchik's purse from her shopping cart outside a Wal-Mart and fled, and the victim fell after chasing her to her car. Yourchik's children said she suffered a stroke less than three months later and died in November.

"I'm so sorry," she told Kathy Yourchik, who opened her arms, embraced the sobbing woman and told her she forgave her, the newspaper said.

Brittany Boyd, who said she was a heroin addict looking for money when she took the purse, also tearfully apologized to Yourchik's children when she entered her plea in May.

Jenna Boyd testified at a previous hearing that she had no idea her sister had planned to rob anyone and believed that she was waiting to make a drug purchase.

Kathy Yourchik testified during Brittany Boyd's sentencing hearing that her mother was never the same after the robbery.

"She was never able to walk again without aid. She was never able to put her shoes and socks on again. She never drove her car again," Kathy Yourchik said in May. "I had to crawl in bed with her until she fell asleep because she was afraid to go to sleep because of what you did. You crushed her."